JSFiddle - React, Tailwind, and code Playground

HTML

<div class="datepicker"  data-fechas='["10/10/2014","12/10/2014","13/10/2014"]'></div>

JavaScript

jQuery(function(){
    jQuery('.datepicker').each(function (i) {
				var $item = jQuery(this);
				var fechas = $item.data('fechas');				
				var options = {
					'dateFormat' : 'dd/mm/yy',
					'display' : $item.data('display') == '' ? '' : $item.data('display'),
					beforeShowDay: function(date) {
						console.log(date);
						if ( fechas.length ) {
							for( var i = 0; i < fechas.length; i++ ) {
								console.log(fechas[i]);
								if ( fechas[i] == date) {
									return [true, 'css-class-to-highlight', 'tooltipText'];
								}
							}
						}
					}
				}
				$item.datepicker( options );
			});
});